mirror of
https://github.com/brain-hackers/u-boot-brain
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![Albin Tonnerre](/assets/img/avatar_default.png)
Signed-off-by: Albin Tonnerre <albin.tonnerre@free-electrons.com> Acked-by: Stefan Roese <sr@denx.de>
231 lines
5.5 KiB
C
231 lines
5.5 KiB
C
/*
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* (C) Copyright 2003
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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/*
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* Date & Time support for the DS12887 RTC
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*/
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#undef RTC_DEBUG
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#include <common.h>
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#include <command.h>
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#include <config.h>
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#include <rtc.h>
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#if defined(CONFIG_CMD_DATE)
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#define RTC_SECONDS 0x00
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#define RTC_SECONDS_ALARM 0x01
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#define RTC_MINUTES 0x02
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#define RTC_MINUTES_ALARM 0x03
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#define RTC_HOURS 0x04
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#define RTC_HOURS_ALARM 0x05
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#define RTC_DAY_OF_WEEK 0x06
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#define RTC_DATE_OF_MONTH 0x07
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#define RTC_MONTH 0x08
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#define RTC_YEAR 0x09
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#define RTC_CONTROL_A 0x0A
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#define RTC_CONTROL_B 0x0B
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#define RTC_CONTROL_C 0x0C
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#define RTC_CONTROL_D 0x0D
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#define RTC_CA_UIP 0x80
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#define RTC_CB_DM 0x04
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#define RTC_CB_24_12 0x02
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#define RTC_CB_SET 0x80
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#if defined(CONFIG_ATC)
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static uchar rtc_read (uchar reg)
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{
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uchar val;
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*(volatile unsigned char*)(RTC_PORT_ADDR) = reg;
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__asm__ __volatile__ ("sync");
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val = *(volatile unsigned char*)(RTC_PORT_DATA);
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return (val);
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}
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static void rtc_write (uchar reg, uchar val)
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{
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*(volatile unsigned char*)(RTC_PORT_ADDR) = reg;
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__asm__ __volatile__ ("sync");
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*(volatile unsigned char*)(RTC_PORT_DATA) = val;
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__asm__ __volatile__ ("sync");
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}
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#else
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# error Board specific rtc access functions should be supplied
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#endif
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int rtc_get (struct rtc_time *tmp)
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{
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uchar sec, min, hour, mday, wday, mon, year;
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/* check if rtc is available for access */
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while( rtc_read(RTC_CONTROL_A) & RTC_CA_UIP)
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;
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sec = rtc_read(RTC_SECONDS);
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min = rtc_read(RTC_MINUTES);
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hour = rtc_read(RTC_HOURS);
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mday = rtc_read(RTC_DATE_OF_MONTH);
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wday = rtc_read(RTC_DAY_OF_WEEK);
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mon = rtc_read(RTC_MONTH);
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year = rtc_read(RTC_YEAR);
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#ifdef RTC_DEBUG
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printf( "Get RTC year: %d; mon: %d; mday: %d; wday: %d; "
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"hr: %d; min: %d; sec: %d\n",
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year, mon, mday, wday, hour, min, sec );
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printf ( "Alarms: hour: %02x min: %02x sec: %02x\n",
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rtc_read (RTC_HOURS_ALARM),
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rtc_read (RTC_MINUTES_ALARM),
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rtc_read (RTC_SECONDS_ALARM) );
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#endif
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if( !(rtc_read(RTC_CONTROL_B) & RTC_CB_DM))
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{ /* Information is in BCD format */
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printf(" Get: Convert BSD to BIN\n");
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tmp->tm_sec = bcd2bin (sec & 0x7F);
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tmp->tm_min = bcd2bin (min & 0x7F);
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tmp->tm_hour = bcd2bin (hour & 0x3F);
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tmp->tm_mday = bcd2bin (mday & 0x3F);
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tmp->tm_mon = bcd2bin (mon & 0x1F);
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tmp->tm_year = bcd2bin (year);
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tmp->tm_wday = bcd2bin (wday & 0x07);
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}
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else
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{
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tmp->tm_sec = sec & 0x7F;
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tmp->tm_min = min & 0x7F;
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tmp->tm_hour = hour & 0x3F;
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tmp->tm_mday = mday & 0x3F;
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tmp->tm_mon = mon & 0x1F;
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tmp->tm_year = year;
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tmp->tm_wday = wday & 0x07;
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}
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if(tmp->tm_year<70)
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tmp->tm_year+=2000;
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else
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tmp->tm_year+=1900;
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tmp->tm_yday = 0;
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tmp->tm_isdst= 0;
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#ifdef RTC_DEBUG
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printf ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
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tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
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tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
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#endif
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return 0;
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}
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int rtc_set (struct rtc_time *tmp)
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{
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uchar save_ctrl_b;
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uchar sec, min, hour, mday, wday, mon, year;
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#ifdef RTC_DEBUG
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printf ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
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tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
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tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
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#endif
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if( !(rtc_read(RTC_CONTROL_B) & RTC_CB_DM))
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{ /* Information is in BCD format */
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year = bin2bcd(tmp->tm_year % 100);
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mon = bin2bcd(tmp->tm_mon);
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wday = bin2bcd(tmp->tm_wday);
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mday = bin2bcd(tmp->tm_mday);
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hour = bin2bcd(tmp->tm_hour);
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min = bin2bcd(tmp->tm_min);
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sec = bin2bcd(tmp->tm_sec);
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}
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else
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{
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year = tmp->tm_year % 100;
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mon = tmp->tm_mon;
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wday = tmp->tm_wday;
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mday = tmp->tm_mday;
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hour = tmp->tm_hour;
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min = tmp->tm_min;
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sec = tmp->tm_sec;
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}
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/* disables the RTC to update the regs */
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save_ctrl_b = rtc_read(RTC_CONTROL_B);
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save_ctrl_b |= RTC_CB_SET;
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rtc_write(RTC_CONTROL_B, save_ctrl_b);
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rtc_write (RTC_YEAR, year);
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rtc_write (RTC_MONTH, mon);
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rtc_write (RTC_DAY_OF_WEEK, wday);
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rtc_write (RTC_DATE_OF_MONTH, mday);
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rtc_write (RTC_HOURS, hour);
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rtc_write (RTC_MINUTES, min);
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rtc_write (RTC_SECONDS, sec);
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/* enables the RTC to update the regs */
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save_ctrl_b &= ~RTC_CB_SET;
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rtc_write(RTC_CONTROL_B, save_ctrl_b);
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return 0;
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}
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void rtc_reset (void)
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{
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struct rtc_time tmp;
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uchar ctrl_rg;
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ctrl_rg = RTC_CB_SET;
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rtc_write(RTC_CONTROL_B,ctrl_rg);
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tmp.tm_year = 1970 % 100;
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tmp.tm_mon = 1;
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tmp.tm_mday= 1;
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tmp.tm_hour = 0;
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tmp.tm_min = 0;
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tmp.tm_sec = 0;
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#ifdef RTC_DEBUG
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printf ( "RTC: %4d-%02d-%02d %2d:%02d:%02d UTC\n",
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tmp.tm_year, tmp.tm_mon, tmp.tm_mday,
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tmp.tm_hour, tmp.tm_min, tmp.tm_sec);
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#endif
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ctrl_rg = RTC_CB_SET | RTC_CB_24_12 | RTC_CB_DM;
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rtc_write(RTC_CONTROL_B,ctrl_rg);
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rtc_set(&tmp);
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rtc_write(RTC_HOURS_ALARM, 0),
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rtc_write(RTC_MINUTES_ALARM, 0),
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rtc_write(RTC_SECONDS_ALARM, 0);
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ctrl_rg = RTC_CB_24_12 | RTC_CB_DM;
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rtc_write(RTC_CONTROL_B,ctrl_rg);
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}
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#endif
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